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THE BASEMENT WATCHDOG Model BWD12-120 Big Dog CONNECT 3,500 GPH at 0 ft. and 2,200 GPH at 10 ft. Battery Backup Sump Pump System with Smart WiFi-Capable Monitoring Controller and 20-Amp Charger

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$469.00

$ 99 .00 $99.00

In Stock

About this item

  • Pumps 2,200 GPH at 10 ft. lift and 3,500 GPH at 0 ft. lift
  • USB port allows for connection to a Basement Watchdog WiFi Module (BW-WiFi2 - sold separately), allowing you to receive real-time alerts while away from home (text, email, or push notifications)
  • Remote terminal allows the ability to connect with a home-security system or other device
  • User-friendly control panel provides 24-hour-a-day monitoring, detects irregularities, sounds an alarm, and pinpoints problems and solutions
  • Powerful 20-Amp multistage smart charger charges the battery quickly and shuts off completely to prolong battery life
  • Runs the pump weekly to ensure it is working properly
  • Compatible with maintenance-free AGM batteries or wet-cell batteries
  • Can take over for your primary pump indefinitely when AC power is available
  • Increase runtime by connecting 2 standby batteries (BW-27AGM) using the Basement Watchdog parallel jumper cable (PJC)
  • Includes control unit with a dual float switch, pump with a 1½-inch PVC pipe adapter, battery box and 20-Amp charger (battery NOT included - sold separately)



Product Description

Features of The Basement Watchdog Big Dog CONNECT Battery Backup Sump Pump

backup pump controller monitors pump, power and battery conditions 24/7

24/7 Monitoring

The controller for The Basement Watchdog Big Dog CONNECT (Model BWD12-120) provides crucial, 24-hour-a-day monitoring of pump, power and battery conditions, ensuring your sump pump is ready to protect. The easy-to-understand controller detects irregularities, sounds an alarm, and visually pinpoints problems and solutions on the front panel.

controller provides automatic protection

Automatic Protection

Having The Basement Watchdog Big Dog CONNECT (Model BWD12-120) battery backup sump pump on guard gives you confidence that your basement is protected. The control box automatically monitors the system, and should the power go out or the main sump pump fail, the battery backup sump pump will take over to keep your basement dry.

dual float switch, reliably activates pump

Dual Float Switches—Twice the Protection

The Basement Watchdog Big Dog CONNECT (Model BWD12-120) battery backup sump pump includes a micro-reed Dual Float Switch. We introduced this technology, proven reliable in other uses for over 50 years, to the pump industry and improved it by including two floats. Simply stated: if one float is good, two is better.

automatic multistage 20-Amp charger

Automatic Charging

The Basement Watchdog Big Dog CONNECT (Model BWD12-120) battery backup sump pump is equipped with an automatic, multi-stage, 20amp charger that keeps the battery fully charged and ready to go, plus it’s compatible with our maintenance-free battery. If your main pump fails, the charger is strong enough to power the pump directly off wall power, allowing for unlimited runtime.

Wi-Fi module, BW-WiFi2, be in the know while on the go about what's happening with your pump

Remote Notification

Knowing the status of your sump pump is critical whether you are at home or away. The Basement Watchdog Big Dog CONNECT (Model BWD12-120) battery backup sump pump can link to The Basement Watchdog Wi-Fi Module (Model BW-WiFi2) or a home-security system, allowing for real-time alerts via text, email, push notifications, or from your home-security provider.

matching batteries made to power The Basement Watchdog backup pumps

Matching Batteries

The Basement Watchdog Big Dog CONNECT (Model BWD12-120) battery backup sump pump is designed to be used in conjunction with our Maintenance Free (AGM) Standby Battery (Model BW-27AGM). This system accommodates two batteries for double the runtime.

Protecting homes and basements for over 3 decades

30+ Years Protecting Basements

The Basement Watchdog has been protecting homes for over 30 years and continues to be a market leader. We build the most dependable, user-friendly pumps in the industry using intelligent design, premium components, and quality manufacturing practices that include thoroughly testing every single unit.


J. Mendenhall
Reviewed in the United States on March 8, 2025
Already better than the Zoeller Aquanot 508 it replaced. I really like the dual switch setup so it has a backup. It flows much more water than the Zoeller. The system is quiet, and my initial impression is that it is better build quality than the Zoeller battery backup sump. The warranty is certainly better. Time will tell if it lasts, but a Zoeller 508 pump quit within 3 years, and the switch went out at 5. I also found an issue with the pump when I removed the replacement pump on the Zoeller at 2 years old when I replaced the system with the basement watchdog.
Andy Werem
Reviewed in the United States on March 6, 2025
perfectly fine, only the battery acid sensor no place to install because system has dry battery
Eddie Pajak
Reviewed in the United States on April 10, 2024
The media could not be loaded.
Christopher Lords
Reviewed in the United States on February 27, 2023
Please with the overall solution, several hours to install but the instructions are very good.
JTB
Reviewed in the United States on December 31, 2022
Replaced 20+ year old Watchdog. Works well and very good customer support.
Fujii
Reviewed in the United States on January 7, 2022
The pump had rust on it, the float switch was dirty, the warning instructions for pump installation was inside battery holder, jumper cables were bent and wing nuts missing, controller unit was not in plastic packaging and dirty, warranty card missing... and secondary packaging in poor condition. Wear and tear likely minimal and serial number indicates relatively recent unit, but definitely not "New" as advertised. I'm hoping the $90 savings doesn't deteriorate the expected 12-15 year life Glentronics suggests for this model.
Customer
Reviewed in Canada on February 6, 2016
Exactly what I wanted. Quick delivery and nothing missing
Charlotte A. Cavatica
Reviewed in the United States on May 26, 2010
This was recommended to me by my plumber, who installed the unit. I am very pleased with it so far. The warning light was on once & I just had to reset it. It indicated that it went on during a power outage. I had occasion to call the company with a question & the tech connected me with management who were so helpful & explained in detail their answer to my query. 6 mos. of usage & it has saved me several times from a flooded basement.
Mushmouth
Reviewed in the United States on December 3, 2009
I have a garage that occasionally will flood during heavy rains because the garage is at the end of the driveway and the garage end of the driveway is about 5 feet lower than street level. Such flooding would occur 1 or 2 times a year and would last for less than 1/2 hour. I needed a pump that would turn on automatically when water was present, had a battery backup and would tell me that it had activated. This unit does all this and has worked flawlessly for almost 2 years now.
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